| Influences of nano-TiO2 on the chloroplast aging of spinach under light. | |
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MedLine Citation:
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PMID: 15930594 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The effects of nano-TiO2 (rutile) on the chloroplast aging of spinach under light were studied. The results showed that when the chloroplasts were illuminated for 1, 5, and 10 min with 500 micromol/cm2/min light intensity, respectively, the evolution oxygen rate was rapidly increased; when the chloroplasts were treated for 20, 30, and 40 min with 500 micromol/cm2/min light intensity, respectively, the evolution oxygen rate was gradually decreased. While spinach was treated with 0.25% nano-TiO2, the rate of evolution oxygen of chloroplasts in different illumination times (1, 5, 10, 20, 30, and 40 min) was higher than that of control, and when the illumination time was over 10 min, the reduction of the evolution oxygen rate was lower than that of control. It suggested that nano-TiO2 treatment could protect chloroplasts from aging for long-time illumination. The mechanism researches indicated that nano-TiO2 treatment could significantly increase the activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD), decrease accumulation of reactive oxygen free radicals and the level of malondialdehyde (MDA), and maintain stability of membrane structure of chloroplast under light. |
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Authors:
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Fashui Hong; Fan Yang; Chao Liu; Qing Gao; Zhigang Wan; Fugen Gu; Cheng Wu; Zhenni Ma; Juan Zhou; Ping Yang |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Biological trace element research Volume: 104 ISSN: 0163-4984 ISO Abbreviation: Biol Trace Elem Res Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-06-02 Completed Date: 2005-09-19 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7911509 Medline TA: Biol Trace Elem Res Country: United States |
Other Details:
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Languages: eng Pagination: 249-60 Citation Subset: IM |
Affiliation:
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College of Life Sciences, Suzhou University, Suzhou-215006, People's Republic of China. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Catalase
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metabolism Chloroplasts / drug effects, physiology*, radiation effects* Intracellular Membranes / drug effects Light* Permeability / drug effects Peroxidases / metabolism Photosynthesis / drug effects* Reactive Oxygen Species / metabolism Seedling / drug effects, physiology Spinacia oleracea Stimulation, Chemical Superoxide Dismutase / metabolism Titanium / pharmacology* |
| Chemical | |
Reg. No./Substance:
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0/Reactive Oxygen Species; 13463-67-7/titanium dioxide; 7440-32-6/Titanium; EC 1.11.1.-/Peroxidases; EC 1.11.1.6/Catalase; EC 1.15.1.1/Superoxide Dismutase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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